Abstract: An automobile seat having an infinitely adjustable thigh support is disclosed. The seat includes an air operated bladder mounted between a rigid extension on the seat bottom frame and a padded thigh support member pivotably mounted to the seat bottom frame at the thigh location of an occupant of the seat. The thigh support member is positionable at any of an infinite number of intermediate support positions with the thigh support cushion maintained in contact with the seat cushion at all positions of the thigh support.

Abstract: In a reciprocating wiper system for motor vehicles with a piston adjustably guided in a housing a slide fixed on the housing in a torsionally firm way is provided as a protection against twisting, the slide is longitudinally guided on a guide element fixed to the housing. To compensate for unavoidable tolerances of position and shape of the guide elements and the slide a calotte-shaped bearing body is fittingly guided on the guide element. The bearing body is movably mounted with play in the radial direction in a calotte-shaped receiver on the slide.

Abstract: A hydraulic servo brake system with slip control. Brake circuits (18, 22, 25) with supply valves (28, 32, 35) and discharge valves (29, 33, 36) for the control of the wheel cylinder pressures during slip control are provided. Throttle points (38) are arranged within the supply valves. Each supply valve is bridged by an auxiliary valve (31, 34, 37) which is switchable into the closed position when the slip control action sets in. In this manner, the pressure gradient for the brake pressure build-up in the wheel cylinders is high before the slip control and low during the slip control.

Abstract: A method and a circuit configuration for suppressing sporadic interferences in the processing of data by means of two circuit systems (2, 3, MC1, MC2). The circuit systems redundantly process the data and, for the purpose of detecting errors and interferences, between the circuit systems data (D1n, D2n) is exchanged and compared for agreement. If the comparators (15, 16, 25', 41.2, 43.1, 46.2, 49.1) detect differences the transferred data will be taken over and the data processing will be continued with the transferred data. This takes place in several consecutive cycles. As soon as the predetermined scope or a predetermined number of cycles with differences between the compared data is exceeded an error will be evaluated and indicated. The circuit configuration is suitable for increasing the tolerance of electronic control circuits (ER) of the type for slip-controlled brake systems.

Abstract: A variable vane-type pump in which a cam ring with variable eccentricity encompasses a rotary piston comprising vanes guided in radial slots. At least one lateral surface of the rotary piston abuts on the contact surface of a control disc with pressure pocket and suction pocket. A channel is provided in the control disc whose intake opening is disposed in the direction of rotation of the pump between pressure pocket and suction pocket and in direct vicinity of the end of the pressure pocket. The channel terminates in a housing chamber, the waste oil chamber, the lubricating channels and/or into the under-vane chambers. After displacement of the cam ring, a connection can be established between the channel and the pressure pocket so that the pressure fluid still delivered can discharge via the channel to safeguard lubrication of the pump.

Abstract: A device for controlling the pressure in an auxiliary-pressure supply system of a hydraulic brake unit for automotive vehicles, which device comprises a diaphragm-type or bladder-type accumulator equipped with a hydraulic and electric switching arrangement by way of which the hydraulic pressure in the pressure accumulator can be reduced to a predetermined value after the engine of the vehicle has been turned off. An electromagnetic multidirectional control valve is used to divert hydraulic fluid back to a reservoir through a pressure-limiting valve connected downstream thereof. After the engine of the vehicle has been turned off, the multidirectional control valve remains open until the accumulator pressure has decreased to at least the gas inflation pressure of the accumulator. The invention reduces permeation of gas molecules through the diaphragm of the accumulator into the hydraulic fluid and thus effects a longer useful life of the pressure accumulator.

Abstract: The present invention is concerned with an electrical switching mechanism for circuits associated with hydraulic systems in automotive vehicles. The switching mechanism comprises at least one switch (13, 15) disposed on a printed circuit board (1), which switch (13, 15) includes a sliding contact (23, 24) fixed to a hydraulically movable carrier (25). The sliding contact (23, 24), along its path of displacement, in various positions (27, 28, 29, 51), between contacts (11, 12; 14, 16) stationarily disposed on the printed circuit board in oppositely spaced relationship, provides for electrically conductive connection or disconnection.

Abstract: A circuit arrangement for controlling the engagement and disengagement of a clutch (8) in the drive connection (2-5) of an automotive vehicle is equipped with transducers (19-22, 51, 52, 53) and with electronic circuits (33) for the logical combination and processing of the signals, and with switching valves (36, 48) which may be fed with the output signals of the circuits (33) and through which the clutch (8) may be operated or locked in the engaged or disengaged position in dependence on driving conditions or rather on measured values characteristic of the driving dynamics and on controlling conditions of the engine.

Abstract: A slip-controlled brake system for automotive vehicles comprising two static brake circuits (17, 18) into which pressure fluid can be introduced in case of control, comprising a master cylinder assembly (12) and a hydraulic booster (11), a hydraulic auxiliary-pressure supply system (2) as well as wheel sensors (S1 to S4) and electronic circuits (38) for determining the wheel rotational behavior and for generating electric braking-pressure control signals. The signals serve to control pressure-fluid inlet valves (4, 5, 6) and outlet valves (7, 8, 9) inserted into the pressure fluid lines (14, 17, 18) for the purpose of slip control. Connected upstream of the hydraulic booster (11) is a vacuum booster (1), the force-output member (51) of which is in operative engagement with the control piston (53) of the booster piston (54) of the hydraulic booster (1).

Abstract: To process the output signal of a rotational speed sensor (2) which generates an alternating voltage dependent in respect of frequency and amplitude on the rotational speed, two low-pass filters (TP1, TP2) serve to produce a useful signal (I1), on the one hand, and a reference signal (I2), on the other hand. The two signals are compared. In dependence on the difference of these signals (I1, I2) a pulse-shaped output signal, namely the processed sensor signal, is generated by means of a comparator (7). The reference signal dynamically follows the useful signal with the aid of a control signal issue by an adapter circuit (20,21).

Abstract: An anti-lock hydraulic brake system with a hydraulic brake power booster (3) and two static brake circuits (I, II) is provided. Connected to one brake circuit (I) are the two rear wheels (HR, HL), while to the other the two front wheels (VR, VL) are connected by way of multi-directional control valve (11 to 16) which sever for the braking pressure modulation and/or the slip control. In the event of slip control, controlled dynamic pressure out of an auxiliary-pressure supply system (4, 5) is introduced by way of the brake power booster (3) into the static brake circuits (I, II) through the intermediary of two hydraulically isolated circuits with main valves (31, 32) which are independent of each other. A positioning device (42) for limiting the pedal travel communicates hydraulically with the main valve (31) of the rear wheel brake circuit (I). The main valve (31) controlling the dynamic fluid flow into the rear wheel brake circuit is equipped with an additional pressure monitoring switch (35).

Abstract: In order to control the wheel slip with an anti-lock brake system, in a vehicle with all-wheel drive and lockable differentials (29, 33), in particular with a lockable distribution differential (29), further braking pressure rise in the rear-wheel brakes (9, 10) is prevented for a predetermined period of time, with the locks (34, 35) engaged and with slip control activated. As a result, the driving stability of the vehicle is increased during braking with slip control and with the differential locks (34, 35) engaged.

Abstract: A hydraulic brake system with a master cylinder actuatable by a brake pedal (44) by the intermediary of a power booster (1) and with valve means interposed between the master cylinder (3) and the wheel brakes (18, 19, 20, 21) connected thereto. Pressure fluid can be removed from the brake circuits (13, 14) and replenished subsequently out of an auxiliary-pressure source (4, 52, 53). An auxiliary piston (38, 64) is located between the force-output member (2) of the power booster (1), on the one hand, and the piston (31, 36) of the master cylinder (3), on the other hand, for the purpose of generating a controlled pressure, at the end of which auxiliary piston close to the master cylinder piston (31, 36) a duct (49) is provided which is closable by a valve ball (41) that cooperates with the portion of the master cylinder piston (31) close to the auxiliary piston (38).

Abstract: An internally straddling type disc brake for automotive vehicles is disclosed including a cast brake ring having two spaced apart sectional friction brake rings defining two braking surfaces separated by a plurality of axial ribs defining a plurality of peripheral cooling ducts between the sectional friction rings. At least two peripheral radial connecting elements extend from the ribs centrally between the sectional friction brake rings and are connected to corresponding connecting sections on a brake carrier.

Abstract: A radial piston pump includes an axially slidable rotor which is rotatably connected to a connected shaft through a spring clutch engaging one end face of the rotor. The rotor is located in a housing or in the stator so as to constitute a frontal gap between the rotor and the housing or stator on the pressure side of the machine, through which frontal gap, during operation of the device, pressure fluid of the pressure side is permitted to be supplied to at least one sector area of that end face of the rotor opposite the spring clutch. This causes centering of the rotor by the spring clutch and by the pressure of the pressure side in such a manner that no metallic contacts occur in an axial direction and, thus, no friction losses.

Abstract: A hydraulic brake system comprising a pedal-operated brake booster (5), which is connected with the master cylinder (3) and includes an auxiliary pressure supply system (13), a booster piston (4), and a booster chamber (7) wherein an auxiliary pressure is established which is proportional to the foot pressure (F). The hydraulic brake system is provided with wheel brakes (14,15,16,17) connected to the master cylinder (3), a filling stage cylinder (18) is provided which displaceably houses a two-stage piston (20). A pressure chamber (21) is arranged in front of the large stage (83) of the two-stage piston (20) and a filling chamber (22) is arranged in front of the small stage (84) of the two-stage piston (20). In this arrangement, the filling chamber (22) communicates with one of the working chambers (26) of the master cylinder (3) and/or a brake line (28) by way of a pressure line (25).

Abstract: A braking pressure generator consists of a hydraulic brake booster (2) actuatable by a brake pedal (16) and of a master brake cylinder (1) whose master cylinder piston (19) is actuatable by a booster piston (14) pressurizable with an auxiliary hydraulic pressure. The booster piston (14) is guided sealedly and axially displaceably in the bore of an annular secondary cylinder piston (41) which, with a front face (52), confines the booster chamber (13) and which, with its stepped surface area (51), confines a secondary cylinder chamber (44) communicating with a pressure chamber (22) of the master brake cylinder (1) via a pressure line (46). In the brake actuating direction, the secondary cylinder piston (41) is supported at a stop ring (48) of a connecting rod (20) between the booster piston (14) and the master cylinder piston (19).

Abstract: A slip-controlled brake system for motor vehicles with four-wheel drive, wherein one axle (VA) is driven permanently, and the second (HA) is driven by a differential-slip-sensitive coupling (6). The system comprises sensors (S1 to S4) for determining the rotational behavior of the wheels, electronic switching circuits (38, 39, 40) and an auxiliary-pressure supply system (18). For the traction slip control action, brake pressure is introduced into the wheel brakes (11, 12) of only one axle, preferably the permanently driven axle (VA), and the traction slip of all wheels (VL, VR, HL, HR) is, however, controlled thereby. The electronic switching circuits (40) are preferably provided such that the traction slip control action will only set in when, at least at one wheel of the axle (HA) which is not connected to the traction slip control system, an increased traction slip occurs.

Abstract: A variety of Kentucky bluegrass having a good level of disease resistance, excellent turf performance and excellent seed yield.

Abstract: A variety of Kentucky bluegrass having a high level of disease resistance, excellent turf performance in the sun and shade, and a good to medium level of seed yield potential.